Note 10 - Hedging Activities - Summary of Effect of Designated Derivative Financial Instruments on Consolidated Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Consolidated net sales	$ 3,243	$ 3,615	$ 6,421	$ 7,295
Cost of sales	2,230	2,369	4,405	4,766
Gain (loss) recognized in other comprehensive income	42	(14)	74	20
Foreign exchange contracts and other	87	133	95	285
Net income attributable to Corning Incorporated	281	563	457	1,144
Foreign Exchange Contract [Member]
Gain (loss) recognized in other comprehensive income	42	(14)	74	20
Reclassification out of Accumulated Other Comprehensive Income [Member]
Consolidated net sales		13		23
Cost of sales	11	6	18	13
Foreign exchange contracts and other	(1)	(1)	(2)	(2)
Net income attributable to Corning Incorporated	$ 10	$ 18	$ 16	$ 34